Update composer.json

Author: grkamil

composer.json

@@ -8,7 +8,7 @@
     }
   },
   "require": {
-    "php": "^7.1.3",
+    "php": "^7.1.3|^8.0",
     "monolog/monolog": "^1.23|^2.0",
     "illuminate/support": "^5.5 || ^6.0 || ^7.0 || ^8.0"
   },